Add checkboxes also to Sharli, Mastodon and Friendica

[Sav22999]

When they are enabled, so the textbox relative to that service is enabled as well, otherwise it should be disabled.

[Mte90]

As today, it use the fact that if the textarea is not empty show the social, so we can avoid the checkbox.
Implementing this for me will create some conflicts with previous installation.

[Sav22999]

Yes, but it's incoherent because other services have the checkbox to enable/disable.

[Mte90]

I agree that is incoherent but I am not sure if it is the case to do that change...